Title: Alpha-Particle Emission Probabilities in the Decay of 240Pu
Authors: SIBBENS GoedelePOMME StefaanALTZITZOGLOU TimotheosGARCIA-TORANO EduardoJANSSEN HerbertDERSCH RainerOTT OliverMARTIN SANCHEZ AlejandroRUBIO MONTERO Maria Del PilarLOIDL MartinCORON NoelDE MARCILLAC PierreSEMKOW Thomas
Citation: APPLIED RADIATION AND ISOTOPES vol. 68 no. 7-8 p. 1459-1466
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication Year: 2010
JRC N°: JRC53159
ISSN: 0969-8043
URI: www.elsevier.com/locate/apradiso
http://publications.jrc.ec.europa.eu/repository/handle/JRC53159
DOI: 10.1016/j.apradiso.2009.12.006
Type: Contributions to Conferences
Abstract: Sources of enriched 240Pu were prepared by vacuum evaporation on quartz substrates. High-resolution alpha-particle spectrometry of 240Pu was performed with high statistical accuracy using silicon detectors and with low statistical accuracy using a bolometer. The alpha-particle emission probabilities of six transitions were derived from the spectra and compared with literature values. Additionally, some alpha-particle emission probabilities were derived from gamma-ray intensity measurements with a high-purity germanium detector. The alpha-particle emission probabilities of the three main transitions at 5168.1, 5123.6 and 5021.2 keV were derived from seven aggregate spectra analysed with five different fit functions and the results were compatible with evaluated data. Two additional weak peaks at 4863.5 and 4492.0 keV were fitted separately, using the exponential of a polynomial function to represent the underlying tailing of the larger peaks. The peak at 4655 keV could not be detected by alpha-particle spectrometry, while gamma-ray spectrometry confirms that its intensity is much lower than expected from literature.
JRC Institute:Institute for Reference Materials and Measurements

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